Thermostatic air valve



PQMIRK.

THERMOSTATIC AIR VALVE.

APPLICATIQN FILED JAN; 19. 1921.

1,408, 1 21 i, Patented Feb. 28, 1922.v

UNITED STATES PATENT OFFICE.

PAUL MIBK, OF NEW YORK, N. Y.

l THERMOSTATC AIR VALVE.

T0 all who??? t may concern Be it known that I, PAUL MTRK, a citizen of the United States, and resident ofthe city of New York, in the` county oi New York and titate of New York, have invented certain new and useful Improvements in Therinostatic Air Valves, of which the foli lowing is a specication.

This invention relates` to thermostatic air valves for radiators and analogous struetures, having referenceniore especiallyfto an improvement in the valve device set out in my Letters Patent of the United States No. 1,341,016 dated March 25, 192G.

Thepatented device embodies a body having a port, a radiator-engaging portion and a screw-threaded thermostatic supporting portion, said latter portion being in angular relation to the longitudinal axis of said body; a valve head confined Within the body and arranged to. open andclosethe port; a

pin extending through. said port from theV `from the radiator, the valve head is released suiiiciently to permit it to assume .itsclosed position and thus preclude the escape of steamfrom the` radiator; all as will more fully appear by reference to said Letters Patent. i

In the practical operation of the patented structure there is a liability ofthe ejection of water therefrom under certain conditions; that is'to say, thel water of condensation which accumulates within the radiator when the usual manually-operative steam control-V ling valveat the receiving end of the radiator is closed, is sometimes Ydriven 'through the radiator with great force when the steam,

under high pressure, is again delivered to the radiator, and, in consequence, such water is momentarily `splashed through the open` Specification of Letters Patent. Patgnted Feb 28 1922. Application filed January 19, 1921.

Serial No. 438,271.

Fig.` 3 is a transverse sectionon the line 3-3 of Fig. 2.

Fig. -4 is a bottom view of the supplemental valve. v

Referring to the drawings, 1()v designates a metal body having acentral bore 11 which,

inthe form shown, is constricted intermedi- 'ate its ends to provide a port 13 with a lowerV conical valve seat. On the upper end of the body is a hollow projection 12 whichV is preferably, though not necessarily, a separate piece screwedinto the-bore of the body. The outer endfof the projection is constricted to lform a Vport 13 in axial alinemeiit with the port 13,` such ports, in conjunction with the intervening bore of the body, constituting, in effect a single port. The lower end of the body comprises a reduced :screw-threaded portion 14 Vadapted to be enteredinto a tapped orifice-in the wall vofa radiator or other steam-heated metal structure. VVithinthe body is loosely fitted a valve-head 14 which is movable toward or fromthe inner or lower end of the port 13 in manner to close or open the latter as desired. The valve head is kcarried by a stem, preferably a screw-threaded pin'l?, the upperextremity of which protrudes slightly through and above the port 13 of the projection 12. Encircling thestein is a spring 15 which bears at its respective ends against a screw Collar 16 on the stem and against the shouldered portion of the bore at the port 13, the spring thustending to maintain the valve seated and the port 13 closed. The upper protruding end of the stem contacts with the terminal piece 25 on the'free end ofthe U-shaped thermostatic element 19, the other end of which element is screwlos threaded,n as at 21, and fitted to a tapped socket in the side of the body 10. The ter-- minal piece normally bears against the endY mined temperature its free leg and terminal" are oleilected upward or outward sufficiently to permit the spring to move the valve head to its seat and thus close the port 13. i When the radiator, for example, is below a predetermined eifective temperature the port 13 is open, and the air, under the pressure ofadvancing steam, is permitted to escape through the ports 13, 13; but when such temperature is reached the thermostatic element, being heated by conduction, is actuated to release the valve head 11i and Permit it to close the port 13; thereby preventing the escape of the steam to `the atmosphere. When the temperature of the radiator again drops the thermostatic element resumes its normal or contracted condition and thus eifects the opening of the valve port 13 a before.

In accordance with my present` invention 1 provide the body with a supplemental valve construction `which is belowl and'in spaced relation to the valved port 'so as to prevent the expulsion of water of condensation through the device when steam is ini"` tially delivered to the radiator las previously mentioned." This construction comprises nipple 26, which is screwed into and constitutes in effect a detachable continuation of the projection 14. Within this nipple is formed a restricted axial port 27 having a lower conical seat for a metal ball valve 28,' which is confined withinv the chamber below thel port 27 by a series of inw'ardlyextending lips 29, and is freely movable to close oropen the port 27. yllh'e lips 29, which are formed by splitting and crimping lthe outer end of the nipple, are slightly curved yorV dished inwardly as shown, so as to support theball at separated points, andthus provide spaced air-vents 30 leading into the `valve chamber. Y i

By the construction above described it will be seen that any water of condensation that may be carried through the radiator in the initial impulse ofthe incoming steam, strikes the ball valve 28 and forces it to its seat, thus closing the port 27 and `precluding the entrance of the water into the bore ot the supporting` body.V The water whenits advance is thus checked immediately backs into the radiator and the valve 28 moves from its seat and opens the port 27, wheren upon the air coniined in the radiator passes through the vents into the proximate valve chamber and thence through the open port 27 into the bore of the body 10. The port 13 being open, the air passes therethrough and escapes to the atmosphere. When the radiator is heated suiiiciently the thermostatic element is actuated as previously de scribed to release the valve-head 14 and thus close the port 13 in a manner to prevent the escape of the steam to the atmosphere.

It is to be noted that the nipple 26 together with its permanently contained ballvalve 28fcan be `readily removed from the main body of the device in order to permit the cleaning, repair or renewal ofthe valve parts within saidl body, or for the replacement of said nipple and ball-valve, as may be required. f

It is also to be noted that the ports 27 13, 13 are in axial alinement'with eachother and with the bore of the mainsupporting body, thus ensuring a direct unobstructed path for the air from the radiator when the ports are functioning.

In the present instance the free end of the U-tube is provided with a centrally-perforated` plug- 31 which, after the tube isv filled with thermal liquid, is hermetically sealed Vby a tapering pin 32. The .socketed' screw-threaded end of the terminal piece 25 is then screwed onvthe threaded end of the tube so as to enclose the projecting end of theV pingand look it securely in place.

1. In a thermostatic air-valve for radia# tors, a body having a longitudinal bore, including an `axial port, and havingalso a radiator-engaging portion at one end, a valve-head in operative relation'to said port, a valve-stem extending loosely through said port and'protruding vvbeyond the oppositeend of said body, a U-shaped thermostatic element havingl onen leg thereof secured to the body and' the other leg positioned normally to limit the outward movement of the valvestem and thus maintain the valve-head in open position, and a nipple detachably se' cured lto the said radiator-engaging portion, said nipple having a port therein, aballvalve loosely supported ladjacent thelatter port, said nipple having means for supportthermostatic element having vone leg secured to the body land the other leg posin tioned normally to limit the outward movementofathe valve-stein and thus maint-ain the valve-head in open position, and a nipple detachably secured-to the said radiator-enf gaging portion,said nipple having a port therein, 'a ball-valve, andv inwardly-turned curved lips which loosely support said valve adjacent the latter port and provide spaced air-vents- 3., In a thermostatio air-valve for radiators, a body having a longitudinal bore constricted between the ends of the body to forni an intermediate port, one end of the body being constrieted to forni a port in communication with the intermediate port, and the opposite end of the body being` provided with a radiator-engaging portion, a nipple detaohably secured to said radiatorengaging portion having an interior port in axial alinernent with the other ports, a valvehead for the rst named port, a stem eX- tending therefrom through the first and seeond named ports, a spring tending to move o the valve-head to its seat, a U-shaped ther- Inostatie element having one leg thereof secured to the body and the other leg positioned normally to limit the outward Inovenient of the valve-stem and thus maintain the valve-head in open position, and a ballvalve loosely confined within the nipple, said nipple providing air vents eXteriorly of the valve.

Signed at New York, in the county and State of New York` this 18th day of Jann ary7 A l). 1921. l PAUL MIRK 

